2014
DOI: 10.1002/pam.21760
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A Conceptual Framework for Studying the Sources of Variation in Program Effects

Abstract: Evaluations of public programs in many fields reveal that different types of programs—or different versions of the same program—vary in their effectiveness. Moreover, a program that is effective for one group of people might not be effective for other groups, and a program that is effective in one set of circumstances may not be effective in other circumstances. This paper presents a conceptual framework for research on such variation in program effects and the sources of this variation. The framework is inten… Show more

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Cited by 121 publications
(85 citation statements)
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“…Comparing average outcomes of schools randomized to an intervention group and a control group should produce unbiased estimates of a program's impacts, assuming that randomization was successful in creating equivalent groups, but the contrasts between the conditions are diminished as a result of variation in treatment received (Weiss et al 2013). In the current study, average outcomes across treatment conditions should have produced unbiased estimates of the impacts on teacher efficacy and burnout of two evidence-based prevention programs-PAX GBG and PATHS-intended to build students' social-emotional skills, reduce aggressive behaviors, and help teachers manage their classrooms.…”
Section: Discussionmentioning
confidence: 99%
“…Comparing average outcomes of schools randomized to an intervention group and a control group should produce unbiased estimates of a program's impacts, assuming that randomization was successful in creating equivalent groups, but the contrasts between the conditions are diminished as a result of variation in treatment received (Weiss et al 2013). In the current study, average outcomes across treatment conditions should have produced unbiased estimates of the impacts on teacher efficacy and burnout of two evidence-based prevention programs-PAX GBG and PATHS-intended to build students' social-emotional skills, reduce aggressive behaviors, and help teachers manage their classrooms.…”
Section: Discussionmentioning
confidence: 99%
“…To this end, we used the potential outcome framework (Holland 1986). The potential outcome of a child is the outcome that the child would have under a different set of experiences (Weiss, Bloom, and Brock 2013). We departed from four potential outcomes:…”
Section: Limitations Of Existing Quasi-experimental Research On the Ementioning
confidence: 99%
“…A number of authors have recently reiterated the importance of this kind of analysis(Imai & Ratkovic, 2013;Weiss, Bloom, & Brock, 2014). In particular, the potential for results of this kind of analysis to improve the effectiveness and efficiency of social programs is intuitive: tailoring programs to distinct needs of student subgroups and directing limited resources to where they might do the most good(Schuck & Zeckhauser, 2006).Among a recent series of disappointing student incentive experiments, the results of this study should inspire measured optimism.…”
mentioning
confidence: 97%